3psi one way check valves
3psi one way check valve
Running an open system without pressure and losing coolant?
Well slip this in the 5/16" overflow tube and voilà; you have mild pressure to keep the fluid in your system.
In an non pressure system the fluid evacuates due to:
- excess coolant
- thermal expansion
- excessive flow from higher speeds
- blocked and clogged tubes
- water pump impeller design flaws
This handy dandy little check valve will not suck back but it is a great tool for keeping the fluid in for longer.
We make to order. Please allow adequate time for us to build.
Build time estimates [Feb 4 2026]
Model Ts Brass 12 weeks
Model Ts Black 8 weeks
Model As 13 weeks
Heater cores ~11 weeks
1928-34 Ford Hot rods 8 weeks
Common street rods ~12-15 weeks
Tricky customs & complicated restorations ~25 weeks
We appreciate your patience as we continue to recruit and train new fabricators and manage the labor shortfall our country has been experiencing.
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